Lab Report

Title: Extraction

Name:

Date:

Reaction

CH₃CH₂COO^-Na⁺ + HCl -> CH₃CH₂COOH + NaCl

Table of physical Constants

	CH3CH2COO-Na+	HCl	CH3CH2COOH	NaCl
MW	96.1	36.5	74.1	58.5
moles
grams
mL

Boiling range for your product                                                                     to                     ^oC

Calculate the % yield by first calculating the moles you actually obtained from the distillation and then calculating the moles you could have obtained from the weight of sodium propionate you began with.  See the example below.

PERCENT YIELD CALCULATION     

Percent yield actually means percent of theoretical yield, but the latter is too clumsy to say or write. To begin calculating the % yield, Write the chemical equation of the reaction;

CH₃CH₂COO^-Na⁺ + HCl + -----> CH₃CH₂COOH + NaCl

Create a table such as the one below ;

Data	Org.Salt	HC1	Acid	NaCl
MW(g/mole)	96.0	36.5	74.0	58.5
Grams
Moles

Fill in the table.  The moles of propanoic acid formed is the theoretical yield.  The moles of propanoic acid formed are equal to the moles of sodium propionate used, (look at the balanced equation!).

Now divide the moles of propanoic acid actually obtained from the distillation by the moles theoretically possible and multiply the quotient by 100.

EXTRACTION EXERCISES

1. If, when you are extracting an aqueous solution with an organic solvent, you are uncertain as to which layer in the separatory funnel is aqueous, how would you quickly settle the issue.